Optical instrument



FIG. 1 is a perspective view from the left side of an embodiment of an optical instrument according to the invention.

FIG. 2 is left side elevational view of the embodiment.

FIG. 3 is a right side elevational view of the embodiment.

FIG. 4 is a front elevational view of the embodiment.

FIG. 5 is a rear elevational view of the embodiment.

FIG. 6 is a top plan view of the embodiment; and,

FIG. 7 is a bottom plan view of the embodiment.

In the above drawings, any broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an optical instrument, as shown and described. 